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    Computing transmit and receive filters for a network device
    1.
    发明授权
    Computing transmit and receive filters for a network device 有权

    公开(公告)号：US10256997B2

    公开(公告)日：2019-04-09

    申请号：US15381630

    申请日：2016-12-16

    Applicant: Cisco Technology, Inc.

    Inventor： Mithat C. Dogan ,  Brian D. Hart ,  Jiunming Huang ,  Matthew Silverman

    IPC: H04L25/02 ,  H04L25/03 ,  H04B7/0413 ,  H04W84/12 ,  H04W88/12

    Abstract: The embodiments herein use a factorization based technique for determining filter coefficients for a subset of the subcarriers in a wireless frequency band. Once the filter coefficients for the subset of the subcarriers are calculated, the network device uses these filter coefficients to identify the filter coefficients in a neighboring subcarrier. To do so, the network device uses pseudo-inverse iteration to convert the already calculated filter coefficients into filter coefficients for a neighboring subcarrier. The network device can repeat this process for the next set of neighboring subcarriers until all the filter coefficients have been calculated.

    PRE-ASSOCIATION SOUNDING IN WIRELESS NETWORKS
    3.
    发明公开
    PRE-ASSOCIATION SOUNDING IN WIRELESS NETWORKS 审中-公开

    公开(公告)号：US20240223252A1

    公开(公告)日：2024-07-04

    申请号：US18607064

    申请日：2024-03-15

    Applicant: Cisco Technology, Inc.

    Inventor： Malcolm Smith ,  Jerome Henry ,  Matthew Silverman ,  Indermeet Gandhi

    IPC: H04B7/06 ,  H04W8/22 ,  H04W12/06

    CPC classification number: H04B7/0617 ,  H04B7/0626 ,  H04W8/22 ,  H04W12/06

    Abstract: Devices, systems, methods, and processes for pre-association sounding executed between a user device and a network device are described herein. The user device may announce its pre-association sounding capability to the network device. The network device, also supporting pre-association sounding, may transmit a plurality of sounding frames to the user device. The user device may process the plurality of sounding frames, determine channel state information (CSI), and transmit the CSI to the network device. The plurality of sounding frames and the CSI may be exchanged between the user device and the network device prior to the user device associating with the network device. By the time the user device associates with the network device, the network device may already have the CSI required for beamforming one or more transmissions towards the user device. Thus, latency overheads associated with sounding are reduced by performing pre-emptive sounding while in a pre-association state.

    INTERNET OF THINGS (IoT) DEVICE LOCATION TRACKING USING MIDAMBLES
    4.
    发明申请
    INTERNET OF THINGS (IoT) DEVICE LOCATION TRACKING USING MIDAMBLES 审中-公开

    公开(公告)号：US20200275426A1

    公开(公告)日：2020-08-27

    申请号：US16287388

    申请日：2019-02-27

    Applicant: Cisco Technology, Inc.

    Inventor： Matthew Silverman ,  Paul J. Stager ,  Xu Zhang

    IPC: H04W72/04 ,  H04L5/00 ,  H04B7/0404 ,  H04B17/318

    Abstract: In one embodiment, a technique for Internet of Things (IoT) device location tracking using midambles is provided. A first wireless device in connection with an antenna array may receive one or more first data symbols of a data payload from a second wireless device using a first antenna state that assigns a radio path, used for location estimation, to a first antenna of the antenna array. Subsequent to identifying a first midamble of the data payload, the first wireless device may change the first antenna state to a second antenna state that assigns the radio path to a second antenna of the antenna array. The first wireless device may receive one or more second data symbols of the data payload using the second antenna state. The first wireless device may determine a location of the second wireless device based on location information determined using the radio path.

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